1993 Mark VIII

[oneheero]

Does anyone know of anything that may resemble the name Gas Control System? My uncle's Mark VIII wont start up and they assume it has to do with the GCS. I've tried google but found no such thing. They are garage mechanics not pro's so I'm sure it might be made up stuff. They think its due to some sensor and asked me if I could use the internet to find the "Gas Control System" or Gas Control Sensor. I've found no info on anything close to it.

Any ideas what they maybe referring too? Locations, descriptions, names of what they may be reffering to.

 

[Abbens]

You need fuel air spark. I never heard of any gas control system. Does it crank and not start? Does it start and then it just dies? We need more info

 

[oneheero]

You need fuel air spark. I never heard of any gas control system. Does it crank and not start? Does it start and then it just dies? We need more info

Sorry I'm not very good w/ cars at all, its all my uncles asking since they figured I could find it on the internet.

It doesnt fully start up. Like he can crank it and it will start and than just die. Last thing I saw 1 of them try was poor a little bit of gas into the carberator and try again.

 

[rayner601]

Does anyone know of anything that may resemble the name Gas Control System? My uncle's Mark VIII wont start up and they assume it has to do with the GCS. I've tried google but found no such thing. They are garage mechanics not pro's so I'm sure it might be made up stuff. They think its due to some sensor and asked me if I could use the internet to find the "Gas Control System" or Gas Control Sensor. I've found no info on anything close to it.

Uhhh, not meaning to be mean or anything, but please take it to a local auto technician or dealer to diagnose issue. It may cost a few dollars to diagnose, but at least you will know what's going on. But to help you in the right direction, you need to check for the 3 things that a engine needs to run. Spark (use a spark plug tester or a screwdriver inserted where the plug goes and hold it within a 1/16 of an inch away from a metal object to see if it has spark), fuel (check fuel pressure with a gage at the fuel rail and look at the spark plugs to see if they're wet with fuel or they are fouled.) and lastly compression with a compression gage. If all three of those are good, the engine will run. By the description in the 3rd post about it starting up then dying, I am going out on a limb and will deduct that the fuel pump is shot or the filter is plugged. If they are pouring gas down the throttle body and trying to start it and it runs for a second, then the spark and compression part is known to be good, so I am leaning towards fuel. This is a REAL DANGEROUS thing to be doing as a backfire could cause the entire thing to catch fire is fuel is spilled outside the throttle body and burn the entire car to the ground. I know from experience and learned from it.

 

[oneheero]

Uhhh, not meaning to be mean or anything, but please take it to a local auto technician or dealer to diagnose issue. It may cost a few dollars to diagnose, but at least you will know what's going on. But to help you in the right direction, you need to check for the 3 things that a engine needs to run. Spark (use a spark plug tester or a screwdriver inserted where the plug goes and hold it within a 1/16 of an inch away from a metal object to see if it has spark), fuel (check fuel pressure with a gage at the fuel rail and look at the spark plugs to see if they're wet with fuel or they are fouled.) and lastly compression with a compression gage. If all three of those are good, the engine will run. By the description in the 3rd post about it starting up then dying, I am going out on a limb and will deduct that the fuel pump is shot or the filter is plugged. If they are pouring gas down the throttle body and trying to start it and it runs for a second, then the spark and compression part is known to be good, so I am leaning towards fuel. This is a REAL DANGEROUS thing to be doing as a backfire could cause the entire thing to catch fire is fuel is spilled outside the throttle body and burn the entire car to the ground. I know from experience and learned from it.

I know its dangerous, I had to do this on my dad's Nova all the time. Was always scary lol.

Appreciate all the info and no worries on your first statement. I live in San Antonio, Tx, mechanics are a dime a dozen on every block around here. ON top of it, every hispanic adult is a backyard mechanic so they always try to fix it before going to a shop.

Will getting it diagnosed at like autozone work? Or can I get a diagnosis kit and just run it on the car? I'll give them the current info so far.

What filter are you referring to about being plugged? If I just tell them the filter could be plugged should they know which filter or are there several?

 

[rayner601]

The filter referring to the fuel filter. A local professional auto repair shop or a Ford/Lincoln/Mercury dealership needs to look at the car.

 

[mespock]

The filter referring to the fuel filter. A local professional auto repair shop or a Ford/Lincoln/Mercury dealership needs to look at the car.

Not to change the fuel filter .... most have been neglected and are rarely changed ... and you don't need a professional to replace it. Unless you like paying top dollar for 15 min. of labor.

 

[Icedphoenix]

I now this is stupid but is something unplugged i am a mechanic so with more info we could get you headed the right direction and a fuel filter clogged will do that you can get the tool at auto zone and the part just tell them you need the tool to change ford fuel filters and one more thing look in the trunk there is a fuel shut off that is similar to a push button breaker it is a red button with a greyish white suround the door to it is labeled it is in the trunk of the gen 2s but dont now where it is in a 93 look in the owners manual it will NOT let fuel flow if tripped just a few things to look for check all under hood plugs fuses and fuel shut off switch first

 

[XLRVIII]

Ahhhh the joy if acronyms!

let's break this down a bit with some common sense and reasoning.

Car has a no start condition {quite common with a mark 8)

The suspect problem part is called something no other mark 8 owner has ever heard of.
Gas Control System??

Take the first letters of each of those.

GCS...

now pop quiz!

What common mark 8 part causing a "no start issue" that RHYMES with "GEE CEE ESS"?

tick tock
jeopardy music playing


















































(rings buzzer)

What is CPS chuck?
Otherwise known as the CRANK POSITION SENSOR.
it RHYMES with GCS and will cause a no start condition.

Ok alex, tell us what he has won today~!

 

[chicken]

^ was kinda thinking that too as i was reading down, try unplugging it and plugging it back in, its behind the ac compressor. that or maybe the iac (idle air control valve) 93 suck, when it starts does he hit the gas to try and keep it running?

 

[Abbens]

Since you have a 93 autozone won't help you. They can only scan from 96-98 aka gen2. To test for fuel remove the scharder valve, you have to remove the beauty cover.

 

[MediumD]

Many Autozones have an OBDI 'scanner' for Fords that works on our Marks. Worth asking if they'll do it anyway, if not they're likely just being lazy.